Table 1 Characteristics according to categories of left ventricular ejection fraction (LVEF)

 Age, years

79.3 ± 8.9

77.2 ± 10.2

78.0 ± 11.8

0.553

0.297

0.626

0.501

 Male gender

30(58.8%)

26(66.6%)

42(85.7%)

<0.001

<0.05

<0.001

<0.001

 Current smoking

15(29.4%)

12(30.7%)

15(30.6%)

<0.001

<0.001

<0.001

<0.001

 Hypertension

33(64.7%)

28(71.7%)

40(81.6%)

<0.001

0.001

<0.001

<0.001

 Diabetes

12(23.5%)

12(30.7%)

16(32.6%)

<0.001

<0.001

0.001

<0.001

 NYHA III/IV

37(72.5%)

30(76.9%)

44(89.7%)

<0.001

<0.001

<0.001

<0.001

 LVEF(%)

60.1 ± 6.6

44.5 ± 2.9

32.6 ± 4.1

<0.001

<0.001

<0.001

<0.001

 Weight(kg)

59.4 ± 10.8

60.9 ± 10.2

60.0 ± 10.9

0.735

0.143

0.644

0.799

 BMI

22.7 ± 4.0

22.9 ± 3.0

22.0 ± 3.2

0.791

0.654

0.775

0.526

 Nt-proBNP

5825.8 ± 6484.2

9664 ± 10,189.1

11,248.1 ± 10,875.1

<0.05

<0.05

0.408

<0.05

 Coronary heart disease

41((80.3%)

29(74.3%)

39(79.5%)

<0.001

<0.001

<0.001

<0.001

 Prior revascularization

10(19.6%)

7(17.9%)

17(34.6%)

<0.001

<0.001

<0.001

<0.001

 Prior myocardial infarction

6(11.7%)

9(23%)

8(16.3)

<0.001

<0.001

<0.001

<0.001

 Dilated myocardiopathy

0(0%)

5(12.8%)

12(24.4%)

<0.001

<0.001

<0.001

<0.001

 Atrial fibrillation

29(56.8%)

17(43.5%)

16(32.6%)

0.203

0.833

<0.05

0.317

 Diuretics

39(76.4%)

38(97.4%)

42(85.7%)

<0.001

<0.001

<0.001

<0.001

 Aldosteroneantagonists

38(77.5%)

26(66.6%)

34(69.3%)

<0.001

<0.001

<0.05

<0.001

 Beta-blockers

35(68.6%)

21(53.8%)

24(48.9%)

0.075

<0.05

0.831

0.072

 ACEI/ARB

32(61.5%)

21(53.8%)

32(65.3%)

<0.05

0.092

0.055

<0.05

 Digitoxin

8(15.6%)

10(25.6%)

22(44.8%)

<0.001

<0.001

<0.05

<0.001

 Statins

34(66.6%)

28(71.7%)

33(67.3%)

<0.001

<0.001

<0.001

0.001

 Warfarin

15(29.4%)

6(15.3%)

6(12.2%)

<0.001

<0.001

<0.001

<0.001